The heavy rainfall has caused flash flooding in urban areas, low-lying regions, and poor drainage zones. Thousands of residents in the Valley experienced power outages, and a temporary ground stop was issued for flights at Phoenix Sky Harbor International Airport. The flooding poses risks to roads, underpasses, and small waterways, with the potential for wet microbursts and damaging winds. Residents in affected areas, including Scottsdale, Paradise Valley, and Cave Creek, should remain cautious.